Add me to the 'common theme' re HUD and Pro Nav. After buying an IS300 back in 2003 with a £2,500 built-in sat nav I swore I wouldn't buy another built-in system. However after seeing the new system demo'd I gave in. The icing on the cake though is that if you're an iPhone user, the best bit is 'free'... the BMW Remote app. Being able to do a Google search and then just send it to the car is such a time saver!
Also went for HUD after seeing it in my other half's car - love it now.
TV add-on - yeah, too much dosh.
How about the cost of metallic paint though? I mean £1,360 for Tanzanite Blue on a 320d Sport .... lovely colour but are they for real?